Process of briqueting fines of ore, furnace-dust, waste metal, waste iron, &amp;c.



To all whom it may concern:

' UNITED STATES PATENT onnion.

GLASS, or VIENNA, AUSTRIA-HUNGARY.

PROCESS OF BBrIQUETING FINES OF Be it known that 1, Max GLASS, a subjectof the Emperor of AustriasHungary, residing at 176 Hadikgasse, Vienna,Austria- Hungary, have invented certain new and useful Improvements inProcesses of Briqueting Fines of Ore, Furnace-Dust, Waste Metal, WasteIron,'and Like Materials; and

I do hereby declare the following to be afull,

clear, and exact description of the invention.

The present application is a division of my application Serial No.532,603, filed December 11, 1909.

The subject-matter of my invention is an improved process of. briquetingfines of ore, furnace dust, waste metal, waste iron and like materials,such as smelting-products. ores in pieces or in granular or powderedcondition as well as waste material containingiron, and consists addingto the material solutions as binding agent, whose basic salts enable thematerial to be briqueted owing to the product, maintaining itsconsistency sufliciently long under the action of the blast-and oftheheat of the smeltingfurnace. l 'rocess'esknown heretofore forobtaining such briquets were too troublesome andexpensive, as thematerial first had to be carbonized with organic binding agents or thebriqueting operation 'itself had to take place in heat. Now accordingtomy invention thesebasic salts which enable the, material to be boundcan be incorporated in the mass to be briqueted by introducing into thesame salts which when treated in the mass, possibly with the cooperationof the basic material lime, form insoluble compounds as binding means,the lime being also able to cooperate simultaneously in removing excessof moisture.

' The subject-matter of my invention and the mode of carrying it intopractice will now be described with reference tothe following example:For this purpose, salts of the non-volatlle silicic acid may beemployed, when, using lime, the materials can be briqueted completelywithout having to employ heat. In this event, the materlal to bebriqueted may be treated with solutions of water-glass and chlorid ofcalcium with an one, FURNACE-DUST, WASTE METAL, WASTE- moN, ac.

Specification of Letters Patent. Patented May 17, 1910.

No Drawing. Original application filed December 11,1969, Serial No.532,603. Divided and this tion filed March 31, 1910. Serial No. 552,723.

admixture of quicklime and, if desired, of borax, and pressed. To thisend, the mass is first moistened with a solution of calcium chlorid sothat all the pieces are covered on the entire surface as uniformly aspossible, an excess of the solution. being preferably avoided, however.Pulverized quicklime is then added to the mass and thereupon thewater-glass solution is added in suflicient quantity to moisten theentire material while at the same time the use. of an excess ofwater-glass solution is avoided. Finally,

borax either dissolved in water or in the formnf powder is added.;,.-Now, when the mass thus obtained is molded and ex osed to pressure,sodium chlorid and ca c'ium silicate are formed from the water-glass andcalcium chlorid. The 'water which is presentis absorbed by the addedquick-, lime so that it is not necessary to drive the is favorable sinceit protects the briquets from oxidation or rusting when they are exposedfor a long time to the atmosphere. In the event of the briquets beingused for smelting purposes borax strengthens them in the smeltingfurnace since-it melts, as is Well-known, at a very high temperatureand' thus contributes to the binding action dur-" ing the smeltingprocess.

Material technical progress of the present process consists in the massrequiring to be moistened both with chlorid of calcium and withWaterglass without excess, always only until the materials are coveredbyithe substances in question on the entire surface in each case but no.more. If anexcess be present in consequence of unintentional sur- 70same off by heating. The addition of borax 4 chlorid and waterrglass,the following chemical conversion taklng place: V

Na SiO +CaCl Ca SiO +2NaCl and QOaSiOQ+CaO+H O= GaH (SiO ),+'2CaO.

Accordingly, calcium silicate and sodium chlorid are formed. Thesilicate then acts as bindin agent between the individual solid smal estparts of the material. The liberated water is taken up by the added%ruick1ime, while the briquets areprevented om rusting by borax.

The reagents necessary for carrying this modified rocess into practiceare made as follows: l) 55 gr..calcium chlorid dissolved in one literwater, (2) 175 g. silicate of soda dissolved in one liter water, and tothese solutions are added (3) to 50 grs. borax likewise dissolved in oneliter water, and

I claim: e

1. In the process of briqueting ores the cementing together of the ore'particles by a 'cementiti'ous compound insolu le in water formed of abasic silicate.-

-2. The process of briqueting ores which grs. pulverized quicklimecomprises mixing the material with a solution of water-glass, a calciumcompound and quicklime and pressing the same whereby a silicate isformed and acts as a binder, substantially as described.

3. The herei'nde'scribed process of briquetv ing ore, which consists inuniformly moistening the material to be briqueted with a. solution ofcalcium chlorid, adding quicklime thereto, uniformly moistening the massthus obtained with waterlass solution, and in pressing the mass thus 0tained, the quantity of ca cium chlorid solution and waterglass solutionused bein only just suflicient to damp the surface of the masses treatedthereby.

4:. The hereindescribed process of briqueting ore, which consists inuniformly moistoning the material to be briqueted with a solution ofcalcium chlorid, adding quick-' lime thereto, uniformly moistening themass thus obtained with water-glass solution, adding borax thereto, andin molding and pressin the mass thus obtained, the quantity of ca cium'chlorid solution and water-glass solution used beingonly just suflioientto r dampthe surfaces of the masses treated thereby.

.5. A briquethaving its particles held together by cement-itiouscompound insoluble in water formed of a basic silicate.

Intestimony whereof I have'signed my .name to this specification, in thepresence of two subscribing witnesses.

' MAX GLASS.

Witnesses AUGUST Fnccnn, ADA MARIA BERGER.

